Explosion-motor.



No 775.120. PATBNTED NOV. 15, 1904. F HENRIOD-SCHWEIZER.

EXPLOSION MOTOR.

APPLICATION TILED DEO.10, 1902 N0 MODEL. ZSHEETS SHEET 1.

No. 775,120. PATENTED NOV. 15, 1904. P. HENRIOD-SUHWBIZER.

EXPLOSION MOTOR.

APPLICATION FILED DEC. 10. 1902.

N0 MODEL. 2 SHEETS-SHEET 2 lvlfneoaeo sluucnfoz UNITED STATES PatentedNovember 15, 1904.

PATENT OFFICE.

EXPLOSION-MOTOR.

SPECIFICATION forming part of Letters Patent No. 775,120, dated November15, 1904. Application filed December 10, 1902. Serial No. 134,807. (Nomodel.)

To all whom it may concern:

Be it known that I, FRITZ HENRIOD- SoHwEIzER, a citizen of the Republicof Switzerland, residing at Marin, canton of Neuchatel, Switzerland,have invented certain new and useful Improvements in Explosion-Mo- Itors; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

Explosion motors are already known in which the valves, the igniters,and the explosion-chamber are cooled from the outside by means of anair-current produced by a ventilator. Explosion-motors are also known inwhich the ribbed cylinder is surrounded by a casing for coolingpurposes, through the interior of which casing the external air isforced to flow into a suction-chamber. The present device differs fromall these, inasmuch as the cooling of the valves, the igniter-s, and theexplosion-chamber is effected with an air-current by means of which alsothe gas mixture introduced into the explosion-chamber is considerablycooled before entering the said chamber, whereby not only is the actualefficiency of the motor increased, but the mean temperature within thesame kept lower than if the superfluous part of the heat set free by theexplosion were only carried off at the time by the external cooling ofthe parts of the motor. By the intense cooling of the explosive mixturein its passage to the inlet-valve the latter is kept absolutely cool andthe disadvantage connected with existing devicesviz., that with acontinuous vigorous working of the motor the density (in other words,the quantity) of the gas mixture sucked in is diminished in consequenceof the considerable quantity of heat coming from the cylinder and theexplosive mixture entering the explosion-chamber under a constantincrease of temperatureis avoided. As in the present device the quantityof the gas mixture drawn in enters the explosion-chamber at anearly-uniform temperature, its density when entering the chamber islikewise nearly uniform, and in consequence of this the power of themotor will not be diminished just when the greatest demand is made uponit.

In the accompanying drawings one form of the new device is illustratedby way of example, in which Figure 1 is a side view, Fig. 2 a frontview, and Fig. 3 a plan, showing the parts in connection with a motorconstructed according to the present invention.

In the drawings the motor is shown as arranged in an automobile-vehicle,to the frame a of which it is fixed.

Z) is the casing inclosing the cranks of the shaft 0, while 6 and b aretwo cylinders arranged horizontally and transversely to the longitudinalaxis of the vehicle. The motorpistons are coupled in the interior of theeasing 6 with the shaft 0. The explosive mixture is conveyed to each ofthe two cylinders b b from a spraying and mixing chamber (Z through twofeed-pipes 0, each of which terminates in a casing f, containing theinletvalve of the corresponding cylinder. Each of the outlet-valves isarranged in a casing g. The casings f and g, as also theexplosive-chamber of each cylinder, form a single body with the latter,which is furnished with ribs or plates running parallel to thelongitudinal axis of the vehicle. On the explosion-chamber of eachcylinder an igniter It is arranged. In front of each of the ribbedcylindrical bodies Z1 11 is a rotary fan, the delivery side of which isturned to the cylindrical body. Directly within the effective reach ofthis side of the ventilator is the corresponding feed-pipe c for theexplosive mixture, so that before entering the explosion chamber themixture is intensely cooled by the air-current. Hereby not only isgreater efficiency of the motor insured in accordance with the knownprinciples of thermodynamics, but a lower mean temperature in theinterior of the motor than if the superfluous part of the heat set freeby the explosion were only carried off at the time by external coolingof the parts of the motor through the air-current from the fan. Each ofthe fans a is seated in an open-ended casing Z; and is operated by agrooved pulley c, keyed to the driving-shaft. Behind each of the casingsIt,

along each side of the frame a, a plate Z, furnished with diverting-ribsZ Z is fixed. This plate Z, with one of the screens an arranged behindthe cylindrical bodies I) 6 and the bottom n of the carriage form acasing around each of these cylindrical bodies, through which theair-currentproduced by the particular fan is caused to circulate betweenthe ribs around the cylinder after first cooling the pipe 6 as well asthe valve-casings f and g and the igniters h. This circulation of theair-current around the cylinder is a consequence of the peculiar form ofthe casing and causes the cooling action of the air-current to beefi'ectively utilized.

Instead of the rotary fans 2' any other kind of ventilating apparatuscan obviously be employed, and each of the casings surrounding thecylinder can likewise be formed of other parts than those mentionedabove. The essential point is that the explosive mixture should becooled before entering the explosion-chamber, so that it cools the partsof the motor itself from the inside, or, in other words, causes the meantemperature in the interior of the motor to be greatly reduced bydrawing off heat when the temperature is low.

While the attempts hitherto made for effecting the cooling ofexplosion-motors without water have produced such unsatisfactory resultsthat the motor-builders have been compelled to return to water-cooling,notwithstanding the trouble and disadvantages connected therewith,experiments made with the improved device which forms the object of thepresent invention prove that the cooling is so efiectual that directlyafter the fullyloaded motor has been put in action not only do thevalves not burn, but the springs of the outlet-valves, which hithertobecame very hot whatever cooling device might be employed, remain socool that they can be touched with the hand.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is 1. In an engine, the combination with the cylinder, theexplosion-chamber, and the feedpipe, of means for forcing a current ofair over and in contact therewith, and side plates provided withdeflecting-ribs adapted to prevent the diifusion of the air-current andto direct the same upon the parts subject to heating.

2. In an engine, the combination, with the cylinder, theexplosion-chamber and the feedpipe, of a rotary fan so arranged as toforce a current of air over and in contact therewith, an open-endedcasing surrounding the fan and pointing in the direction of the partssubject to heating, spaced plates or ribs arranged in line with theair-current and serving to distribute the same, side plates providedwith deflecting-ribs, and a shield upon the opposite side from the fanand so disposed as to cause a return circulation of the air-current overthe parts subject to heating.

In testimony whereof I aflix my signature in presence of two witnesses.

FRITZ HENRIOD-SGHWEIZER.

